Re: [10GBASE-T] Economic feasibility or Market Potential?
Hi Shimon,
Can you clarify your statement of :
10GBase-T:
- Most of the experts that I talked to concede (at least privately)
that 50m
over INSTALLED cable should not be a huge technical challenge, to say the
least.
Which installed base are you referring to? Is it 50m of Cat5e, Cat6, 4
connector or 2 connector?
What do you think is the acceptable cable reach on UTP to achieve broad
market potential with 10GBase-T?
At 12:47 PM 8/4/2003 -0700, Shimon Muller wrote:
> > Part of the reason that CX4 will enjoy "Broad Market Potential" is that its
> > cost factor is negligible relative to the available alternatives and it is
> > based upon technology that is available today. Initial silicon will have a
> > substantially lower cost than the fiber-optic alternatives, and it can be
> > quickly integrated into MAC ASSP silicon which makes it even more cost
> > effective. At ~1W/port, the power impact on device packaging and system
> > cooling is acceptable, in fact, pretty much equivalent to 1000BASE-T.
>
>
>Hi Dan,
>
>Sorry, I don't buy that.
>
>I agree with Pat that all 5 criteria need to be evaluated together to justify
>any and all of them. But, before you get to that point you need to be able to
>justify each one of them separately. Furthermore, in my mind, the fact that a
>technology is dirt cheap and is technically a no-brainer does not necessarily
>imply that it has broad market potential.
>
>To me the issue is simple. We are comparing two (not necessarily competing)
>technologies that primarily target the same application space, which is the
>datacenter:
>1. 10GBase-CX4:
> - 15m.
> - Non-installed, non-standard, ugly cable.
>2. 10GBase-T:
> - Most of the experts that I talked to concede (at least privately)
> that 50m
> over INSTALLED cable should not be a huge technical challenge, to
> say the
> least. Many of them claim that longer distances can also be achieved.
> - All of the above (maybe with one exception) also concede that there
> is at
> least one new cable that will allow a 100m reach.
>
>In the study group we had several excellent contributions from an esteemed
>802.3
>member that demonstrated the installed cabling length distribution and the
>installed
>cabling forecast 3 years from now. Please see:
>http://ieee802.org/3/10GBT/public/jul03/flatman_1_0703.pdf
>http://ieee802.org/3/10GBT/public/jan03/flatman_1_0103.pdf
>
>Based on the above data, for the datacenter only:
>- 10GBase-CX4 will be applicable to ~25% of the links AT BEST.
>- 10GBase-T will be applicable to 95% of the links AT LEAST.
>
>Therefore, I have trouble reconciling in my mind the claim that #1 has
>broad market
>potential, while #2 does not.
>
>
>Regards,
>
> Shimon.
Regards
Nariman